Pblock Elementsii Result Question 14
14. When $\mathrm{I}^-$ is oxidised by $\mathrm{KMnO} _4$ in alkaline medium, $\mathrm{I}^-$ converts into
(2004, 1M)
(a) $\mathrm{IO}^- _3$
(b) $\mathrm{I} _2$
(c) $\mathrm{IO}^- _4$
(d) $\mathrm{IO}^-$
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Answer:
Correct Answer: 14. ( a )
Solution:
$\mathrm I ^ - $ is oxidised by $\mathrm MnO _4^ - $ in alkaline medium to form $\mathrm IO _3^ - $
$2 \mathrm{KMnO}_4+\mathrm{KI}+\mathrm{H}_2\mathrm{O}\longrightarrow 2 \mathrm{KOH}+2 \mathrm{MnO}_2+\mathrm{KIO}_3$
BETA
